Speaker
Description
γ-induced reactions like (γ, n), (γ, p), and (γ, α) are of interest in several astrophysical scenarios such as Big Bang Nucleosynthesis and the Li-problem, Si-burning in massive stars, p-process. Recently, the ASFIN collaboration, in the framework of an international collaboration, has started an experimental campaign at the High Intensity Gamma-Ray Source (HIγS) dedicated to the study of different γ-induced reactions such as $^{7}$Li(γ,t), $^{102}$Pd(γ,p),$^{102}$Pd(γ,α), $^{112}$Sn(γ,p), $^{112}$Sn(γ,α) and $^{24}$Mg(γ,α). Such kinds of experiments require, among others, a precise determination of the γ-beam flux. The $^{197}$Au(γ,n)196Au reaction is commonly used as a reference process to measure the gamma beam intensity in photonuclear reaction experiments. However, at energies higher than 14.7 MeV, the cross-section values of the $^{197}$Au(γ,n)$^{196}$Au reaction available in the literature (both from experiments and theory) exhibit conflicting values. In this context, a new measurement of the $^{197}$Au(γ,n)$^{196}$Au reaction cross-section was performed at the HIγS facility using the activation method.
In this presentation, an overview of the ASFIN experimental campaign will be provided. Moreover, the experimental procedure and preliminary results of the new measurement of the $^{197}$Au(γ,n)$^{196}$Au reaction cross-section will be shown.
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